How much is 451 Mauritanian Ouguiya to New Belarusian Ruble? 3.19 New Belarusian Ruble is todays conversion result. International currency exchange rate for pair MRO to BYN for today is 0.0071. CNV.to is using the latest data from authority sources, data updates every minute. To calculate reversed currencies go to - 451 BYN to MRO.